Filter cartridge



FIG. 1 is a top perspective view of a filter cartridge showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a side elevational view thereof.

The filter cartridge is comprised of a tapered cylindrical body with a smooth surface except for a single tapered slot as seen in FIGS. 1, 2 and 4. 

The ornamental design for a filter cartridge, as shown and described. 